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[Jan Stránský <question222363@xxxxxxxxxxxxxxxxxxxxx>]

Question #222363 on Yade changed:
https://answers.launchpad.net/yade/+question/222363

Jan Stránský posted a new comment:
Hi Behzad,
you are completely correct :-) there are some analytical estimations, but
for exact match you should do your own calibration.

According to my experience, for uniform particle size, the macroscopic
Poisson's ratio depends only on yade poisson parameter (but not linearly)
and macroacopic Young's modulus is proportional to yade young parameter.
For nonuniform particle sizes I would expect the same trend, but I have no
experience with it..

cheers
Jan
Dne 9.4.2014 18:27 "behzad majidi" <question222363@xxxxxxxxxxxxxxxxxxxxx>
napsal(a):

> Question #222363 on Yade changed:
> https://answers.launchpad.net/yade/+question/222363
>
> behzad majidi posted a new comment:
> Hey guys,
>
> This question is still important and as a PFC user, I'm a little bit
> confused.
> But, what I see from the provided answers the appropriate values of E and
> P for a random packing with or without size distribution can only be found
> by parametric studies. Like, we measure the Young's Modulus of the material
> in the lab. We make a simple DEM model in Yade with the desired
> constitutive law and we change the E and P(maybe) to obtain the
> experimental values.
>
> Would you please let me know if it's the way?
>
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